A mobile radio telephone or portable hot link communicator is described which provides a simple, efficient and effective means of communication to enable a child or elderly person to communicate with a known parent, relative or friend carrying a standard mobile telephone. The hot-link communicator is wrist worn or hangs from a cord around the wearer's neck. The hot-link communicator comprises a preprogrammed module that links it with preferably only one other mobile or fixed telephone. The hot-link communicator comprises very basic functionality and, in some embodiments, no display--only a preprogrammed dialing button and an answer button. The hot-link communicator makes possible communication between parents needing to communicate with their children and between supervising adults and elderly persons needing assistance in that the children and elderly persons do not need to input number in sequence via a key pad or search for a telephone in the rain and dark.